Add perlin noise texture

This commit is contained in:
max.nuding 2022-07-06 13:11:04 +02:00
parent 6f6fc5e375
commit de64b56b38
Failed to extract signature
4 changed files with 84 additions and 6 deletions

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@ -2,7 +2,7 @@ use std::sync::{Arc, Mutex};
use std::time::Instant;
use crate::camera::Camera;
use crate::hittable::{Hittable, Sphere, HittableList, HittableObject};
use crate::hittable::{Sphere, HittableList, HittableObject};
use crate::output::{Output, PNG};
use crate::ray::Ray;
use crate::vec3::{Color, Point3, Vec3};
@ -12,7 +12,8 @@ use rand::distributions::{Distribution, Uniform};
use rayon::iter::{IntoParallelIterator, ParallelIterator};
use crate::material::{Dielectric, Lambertian, Material, Metal};
use crate::aabb::Aabb;
use crate::bvh::BVH;
use crate::noise::NoiseTexture;
use crate::perlin::Perlin;
use crate::texture::CheckerTexture;
mod vec3;
@ -24,6 +25,8 @@ mod output;
mod aabb;
mod bvh;
mod texture;
mod perlin;
mod noise;
fn two_spheres() -> HittableList {
let mut world:HittableList = Vec::new();
@ -43,6 +46,22 @@ fn two_spheres() -> HittableList {
}));
world
}
fn two_perlin_spheres() -> HittableList {
let mut world:HittableList = Vec::new();
let noise = NoiseTexture { noise: Perlin::new() };
let noise_material = Arc::new(Material::Lambertian(Lambertian::textured(Arc::new(noise))));
world.push(Arc::new(Sphere {
center: Point3::new(0.0, -1000.0, 0.0),
radius: 1000.0,
material: Arc::clone(&noise_material)
}));
world.push(Arc::new(Sphere {
center: Point3::new(1.0, 2.0, 1.0),
radius: 2.0,
material: noise_material
}));
world
}
fn random_scene() -> HittableList {
let mut world: HittableList = Vec::new();
@ -134,7 +153,7 @@ fn main() {
let look_from = Point3::new(13.0, 2.0, 3.0);
let look_at = Point3::new(0.0, 0.0, 0.0);
let focus_dist = 10.0;
let focus_dist = 2.0;
// Camera
let cam = Camera::new(
@ -142,16 +161,17 @@ fn main() {
look_at,
Vec3::new(0.0, 1.0, 0.0),
ASPECT_RATIO,
40.0,
20.0,
0.0,
focus_dist,
0.0,
1.0);
// World
let scene: u8 = 0;
let scene: u8 = 1;
let world = match scene {
0 => two_spheres(),
1 => two_perlin_spheres(),
_ => random_scene()
};

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@ -1,4 +1,3 @@
use std::rc::Rc;
use std::sync::Arc;
use rand::Rng;
use crate::hittable::HitRecord;

13
src/noise.rs Normal file
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@ -0,0 +1,13 @@
use crate::perlin::Perlin;
use crate::{Color, Point3};
use crate::texture::Texture;
pub struct NoiseTexture {
pub noise: Perlin
}
impl Texture for NoiseTexture {
fn value(&self, _u: f64, _v: f64, point: &Point3) -> Color {
Color::new(1.0, 1.0, 1.0) * self.noise.noise(point)
}
}

46
src/perlin.rs Normal file
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@ -0,0 +1,46 @@
use rand::distributions::{Distribution, Uniform};
use rand::Rng;
use crate::Point3;
pub struct Perlin {
ranfloat: Vec<f64>,
perm_x: Vec<usize>,
perm_y: Vec<usize>,
perm_z: Vec<usize>,
}
impl Perlin {
const POINT_COUNT: usize = 256;
pub fn new() -> Self {
let range = Uniform::from(0.0..1.0);
let mut rng = rand::thread_rng();
let mut ranfloat = Vec::with_capacity(Perlin::POINT_COUNT);
(0..Perlin::POINT_COUNT).for_each(|_i|ranfloat.push(range.sample(&mut rng)));
Perlin {
ranfloat,
perm_x: Perlin::perlin_generate_perm(),
perm_y: Perlin::perlin_generate_perm(),
perm_z: Perlin::perlin_generate_perm(),
}
}
pub fn noise(&self, point: &Point3) -> f64 {
let i = ((4.0 * point.x()) as i32) & 255;
let j = ((4.0 * point.y()) as i32) & 255;
let k= ((4.0 * point.z()) as i32) & 255;
let idx = self.perm_x[i as usize] ^ self.perm_y[j as usize] ^ self.perm_z[k as usize];
self.ranfloat[idx]
}
fn perlin_generate_perm() -> Vec<usize> {
let mut p = Vec::with_capacity(Perlin::POINT_COUNT);
(0..Perlin::POINT_COUNT).for_each(|i| p.push(i));
let mut rng = rand::thread_rng();
(1..Perlin::POINT_COUNT).rev().for_each(|idx| {
let target = rng.gen_range(0..=idx);
p.swap(idx, target);
});
p
}
}